Company lists · Data refreshed September 2026
Top 25 IT security consulting services based in Chicago, United States
RevenueBase identified 132 IT security consulting services headquartered in Chicago, United States as of September 2026 and tracks 3,551 professional contacts across them, including 1,927 with verified work emails. New York is the largest hub.
This list covers IT security consulting services headquartered in Chicago, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest IT security consulting services based in Chicago, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 947 contacts → | ||||
Indirect evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 874 contacts → | ||||
Indirect evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 628 contacts → | ||||
Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 391 contacts → | ||||
Partial evidence “SDI Presence LLC is an IT consultancy and managed services provider (MSP) that leverages its strong team presence to advance our clients to a secure digital enterprise.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 89 contacts → | ||||
Indirect evidence “At EMPIST, our mission is to fuel businesses with the technology they need to succeed.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 69 contacts → | ||||
Partial evidence “Experiencing a security incident?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 27 contacts → | ||||
Partial evidence “In today’s digitally connected world, cyber security plays a crucial role.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 23 contacts → | ||||
Strong evidence “VBridgeGlobal LLC is a niche IT Services and Consulting organization in Illinois.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 22 contacts → | ||||
Strong evidence “Pearl Consulting Group is a global IT consulting firm dedicated to helping businesses navigate the complexities of technology with confidence.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 contacts → | ||||
Indirect evidence “At Ravenswood Technology Group, we don’t just offer our customers cybersecurity solutions – we deliver value and expertise you can rely on as needs and risks change.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 18 contacts → | ||||
Partial evidence “SecureTrust™, a Sysnet company, leads the industry in innovation and processes for achieving and maintaining compliance and security.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 17 contacts → | ||||
Indirect evidence “Just like people, every business is unique in its own specific way.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 11 contacts → | ||||
Partial evidence “SkyNet Security Systems was founded by a group of highly experienced and innovative security professionals who care about their clients.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 10 contacts → | ||||
Partial evidence “Cyber threats are relentless, and security teams are overwhelmed.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Strong evidence “Security Consulting | Private Investigations | Law Enforcement Consulting | McCarthy Byrnes is a trusted security, investigations, and public safety advisory firm providing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 9 contacts → | ||||
Indirect evidence “Agrada Group provides clear and sustainable solutions to secure and grow your company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 9 contacts → | ||||
Strong evidence “HTA Technology Security Consulting (HTA) is a certified Woman-Owned, Small, Disadvantaged, Minority business with offices in Chicago, IL, and the Washington DC corridor.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 8 contacts → | ||||
Partial evidence “DataGuard Cybersecurity Without The Complexity DataGuard uses state-of-the-art industry resources to implement a multi-layer defense for each client’s unique cyber security needs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 7 contacts → | ||||
Indirect evidence “At Cyber Bark, we bring 100 years of collective experience to the table, serving businesses across the US from our base in Illinois.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 7 contacts → | ||||
Strong evidence “JMA Consulting, LLC brings secure IT solutions to commercial clients in multiple industries nationwide.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 7 contacts → | ||||
Indirect evidence “Amol Solutions strives to be a leader in cybersecurity services for organizations of all sizes.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 6 contacts → | ||||
Partial evidence “The Heliox Group is an IT consultancy with the mission to provide our customers with the highest level of service and expertise with regard to their technological needs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 6 contacts → | ||||
Indirect evidence “CrossRealms is a premier Cybersecurity and Managed Services provider with multiple locations in the United States, Canada, Europe, MENA region, and Asia.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 6 contacts → | ||||
Partial evidence “Clairos is a cybersecurity company that helps organizations build stronger, more manageable security programs through a practical, tailored approach.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 6 contacts → | ||||
Indirect evidence “Not auditors but real hackers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT security consulting services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names IT security consulting services.
- Partial evidence
- Its own public description names part of IT security consulting services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name IT security consulting services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 132 IT security consulting services based in Chicago, United States
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IT security consulting services based in Chicago, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 132 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among IT security consulting services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Chicago, United States whose own description of what they do matches “IT security consulting services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT security consulting services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among IT security consulting services, and records with no verified work email. Companies headquartered outside Chicago are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,927 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
IT security consulting services by metro in the United States
- IT security consulting services in New York296
- IT security consulting services in Houston185
- IT security consulting services in Atlanta180
- IT security consulting services in Washington153
- IT security consulting services in Austin149
- IT security consulting services in Dallas146
- IT security consulting services in Chicago132
- IT security consulting services in Miami117
- IT security consulting services in San Francisco106
- IT security consulting services in Tampa105
- IT security consulting services in Los Angeles101
- IT security consulting services in San Diego96
- IT security consulting services in Denver81
- IT security consulting services in Arlington78
- IT security consulting services in Boston78
- IT security consulting services in Seattle75
- IT security consulting services in Charlotte73
- IT security consulting services in Phoenix65
- IT security consulting services in Orlando60
- IT security consulting services in Las Vegas58
- IT security consulting services in Alexandria57
- IT security consulting services in San Antonio57
- IT security consulting services in Raleigh56
- IT security consulting services in Portland50
- IT security consulting services in Ashburn49
- IT security consulting services in Columbia49
- IT security consulting services in Reston49
- IT security consulting services in Richmond47
- IT security consulting services in Baltimore46
- IT security consulting services in Minneapolis46
- IT security consulting services in Plano46
- IT security consulting services in Columbus44
- IT security consulting services in Irvine43
- IT security consulting services in San Jose42
- IT security consulting services in Frisco41
- IT security consulting services in Indianapolis41
- IT security consulting services in Mclean41
- IT security consulting services in Sheridan41
- IT security consulting services in Pittsburgh40
- IT security consulting services in Wilmington40
- IT security consulting services in Fairfax37
- IT security consulting services in Huntsville37
- IT security consulting services in Nashville37
- IT security consulting services in Scottsdale37
- IT security consulting services in Fort Lauderdale36
- IT security consulting services in Colorado Springs35
- IT security consulting services in Philadelphia35
- IT security consulting services in Alpharetta33
- IT security consulting services in Herndon33
- IT security consulting services in Dover31
- IT security consulting services in Jacksonville30
- IT security consulting services in Springfield29
- IT security consulting services in Albuquerque28
- IT security consulting services in Sacramento28
- IT security consulting services in Cincinnati27
- IT security consulting services in Cleveland26
- IT security consulting services in Irving26
- IT security consulting services in Rockville26
- IT security consulting services in Knoxville25
- IT security consulting services in Tucson25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names IT security consulting services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many IT security consulting services are there based in Chicago, United States?
RevenueBase identified 132 IT security consulting services headquartered in Chicago, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Coalfire, headquartered in Chicago, tops this list with the largest team on record.
Which city has the most IT security consulting services?
New York leads with 296 headquartered companies, followed by Houston (185) and Atlanta (180).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,927 verified decision-maker contacts tracked across these 132 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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